clean up mod button header
make mod button settings tab button tooltip more descriptive
mod button refactor to fix a bunch of bugs

Fixes:

- Status text not displayed/updated
- Outdated calls to $.ajax() for success and failure
- Current sub display problems on multi-sub listings
- Current sub naming conventions
- Action-sub dropdown onchange conflicts

Refactored:

- Introduces generic toolboxPopup() generator
- Cleans up tab behavior
Merge branch 'master' of https://github.com/creesch/reddit-moderator-toolbox

Marged conflict for new NER support from
b023c09188bce9e59984da3fdbd0e69c8e2cff6f